BQ26220PWG4 - English Editing Encyclopedia Entry

Product Overview

Category

BQ26220PWG4 belongs to the category of integrated circuits (ICs) specifically designed for battery charging applications.

Use

This product is primarily used for charging lithium-ion batteries in various electronic devices such as smartphones, tablets, and portable power banks.

Characteristics

• High efficiency charging: BQ26220PWG4 offers efficient charging capabilities, ensuring optimal use of power while minimizing energy loss.
• Fast charging: The product supports fast charging protocols, enabling quick replenishment of battery capacity.
• Safety features: It incorporates multiple safety mechanisms to prevent overcharging, overcurrent, and overheating, ensuring safe and reliable charging operations.
• Compact package: BQ26220PWG4 is available in a small form factor package, making it suitable for space-constrained applications.
• Low standby power consumption: The product consumes minimal power when not actively charging, enhancing overall energy efficiency.

Package and Quantity

BQ26220PWG4 is typically packaged in a compact and robust PowerPAD™ thermally enhanced package. It is commonly supplied in reels or tubes, with quantities varying based on customer requirements.

Specifications

• Input voltage range: 4.5V to 6.5V
• Charging current: Up to 2A
• Charging voltage: Programmable within the range of 3.6V to 4.44V
• Operating temperature range: -40°C to +85°C
• Standby current: Less than 10µA

Detailed Pin Configuration

The BQ26220PWG4 IC has the following pin configuration:

1. VCC: Power supply input
2. GND: Ground reference
3. STAT: Status output pin
4. TS: Temperature sense input
5. PROG: Programming pin for setting charging voltage
6. PG: Power good output
7. BAT: Battery connection pin
8. SYS: System connection pin

Functional Features

• Constant current and constant voltage charging modes
• Programmable charging voltage for compatibility with various battery chemistries
• Thermal regulation to prevent overheating during charging
• Charge termination based on battery voltage and temperature thresholds
• Reverse leakage protection to prevent discharge from the battery when not in use
• Fault detection and reporting for enhanced safety

Advantages and Disadvantages

Advantages

• High charging efficiency leads to reduced energy wastage
• Fast charging capability enables quick battery replenishment
• Multiple safety features ensure safe charging operations
• Compact package size allows for easy integration into space-constrained designs
• Low standby power consumption enhances overall energy efficiency

Disadvantages

• Limited compatibility with specific battery chemistries
• Requires external programming for setting the charging voltage

Working Principles

BQ26220PWG4 operates by regulating the charging current and voltage supplied to the connected lithium-ion battery. It employs a constant current mode initially to charge the battery rapidly until a predefined voltage threshold is reached. The charging mode then switches to constant voltage, maintaining the battery voltage at the programmed level while reducing the charging current gradually. Once the battery reaches its full capacity or certain safety limits are exceeded, the charging process terminates.

Detailed Application Field Plans

BQ26220PWG4 finds applications in various portable electronic devices, including: - Smartphones - Tablets - Portable power banks - Wearable devices - Bluetooth speakers - Digital cameras

Detailed and Complete Alternative Models

1. BQ24296: A similar IC offering multi-cell battery charging capabilities.
2. BQ25892: An alternative IC with USB Type-C support for fast charging applications.
3. LTC4000: A different IC providing high-power charging for industrial applications.

These alternative models offer similar functionalities and can be considered based on specific application requirements.

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